Rotary air-motor.



L. GLAWSON.

ROTARY MR Moms.

Num

I L, GLAWSGN.

ROTARY Am Mama.

APPLIGATIOE FILED JUHE 23,1913.

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L. CLAWSGN. ROTARY AIB. MOTOR. ApPLIoATmH FILED mm1 2s, 1m. v

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LERGY CLAWSON, Oli' HALL, MONTANA.

RTARY ARJVIOTOR.

Specicetion of Letters Patent.

nepi-canoe files nine 191s.

lPsitented (ret. 2'?, 'lill-dfi semi no. 775,451.

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To all whom it may conce/m t Be it known that l, CLAWSON, citi.-

zen of the United States, residing" et Hall, in the county of Granite and State of Montene, have invented certain new and useful Improvements in Rotary Adr-Motors, of which the following is s speciication.

. Mypresent invention relates to improvements in motors, end hss for object the provision of a motor ct simple construction which may be eiiiciently operated by compressed air or simileri'iuid under pressure and which will be effectual for driving machinery.

The invention. is illustrated in the accom panying drawings and Will be hereinafter first fully described, the novel features being then subsequently particularly pointed out in the appended cleims.

In the accompanying drawings: Figure l is a vertical longitudinal section of e motor embodying my improvements; Fig'. 2 is a horizontal section through the same; Fie; 3 is an enlarged deteil view; Fig. e is a, detail perspective View of the lixed caro; Fig; 5 is a general diagrammatic View of the entire apparatus.

ln carrying out my invention, l employ en outer casing or support l which is preferably constructed in two parte suitably secured together, es shown at 2 end which may be provided with a laterally extending; web 3 to be secured to a base plete or bed and which may also be provided With en upper eye l to be engaged by transporting or shifting mechanism. casing l, fl provide e track 2 which is fixed to the outer casing by a bolt-5 and is held in its proper position Within the casing by other adjusting set-screws 6 errenged at intervals around the casing and bearing upon the track so as to hold the members of the track together end in proper position to guide the trzivelinf;r pistons. It will be noted more particularly upon reference to Fig. 2 that the track is composed of lfsheped bars rigidly secured together with their inner angles opposed Vso that the iienpges 'Z of the rollers 8 carried by the outer ends of the traveling pistons may engege the inner faces of the track end be thereby held against lateral movement. The lower por tion of the rech is elong'eted, relative to the upper portion, so that the section 9 ofthe trztclr'will permit' the rollers riding thereon to have en appreciable drop and thereby Within this outerv permit the pressure to act freely upon the descending rollers. The said section 9 of the track eccentric to the pressure chember While the other lower quarter ci' the track is concentric thereto. The upper haii" oi' the track is eccentric to le pressure chamber and describes an arc having its center near the center of a cam hereinafter more particularly mentioned, the track sec tion 9 describing,y ecurve having its center at or near the lowest point in the eircom# ference of said cam.

'lhe casing is constructed with external bea-rings 10 in which ere journeled the shafts ll and 12, the shaft 1l being solid and having a bend pulley 13 secured on its outer end, While the shaft l2 is hollow' to permit the insertion therethrough of e. preesure fluid inlet pipe 14. Upon the inner -end of each of the shafts 1l and l2 is .formed e heed of e rotary casing or chamber, which' casing or chamber is completed by e. ring or annular body 16 fitted between. the seid heads and rigidly secured thereto by bolts l?. The heads ere constructed, :is shown, with inwardly' extending; annuler lienges which t over and egiiinst' the outer surface of the body and' thereby relieve the l securing bolts of side strain.

Radiating from the ring 16 are equidis tant cylinders 18 which may be formed 1ntegrel with the ring or .may be otherwise rigidly connected therewith. The inlet pipe 14s extends entirely across the ceeirne7 con centric with the ringl and hes its inner end disposed Within an internal boss 19 upon that side plate 15 carried by the solid shaft ll and a small clearance space is pro vided between the inner surface of seid boss and the outer surface of the inlet pipe to permit pressure 'fluid to escape into the chamber. A stuffing box 50 is formed in the hollow shaft around the inlet pipe to pren vent leakage, and a spring 5l is arranged in the inner end of said stuffing box to hold the packing rings together while setting,7 up the machine. rihe space around the spring will accommodate a supply of oil te nerim tain the packing rings in proper condition. The inlet pipe 14 and the shafts l1 and l2 ere disposed eccentric to the outer casing and thetreck 2 and nearer that side of the track. which embodies the track section Q; While the cern which hes been previously mentioned and is designated 20 is secured upon the inlet pipe between the side platee lid 15 and is so disposed' 'liat it extends away from that side of the s vk embodying: the track section 9. See'ird hpon each ot the cylinders 18 isa bracket or arin 2l to the outer end of whichlas pivoted a lever ovr swinging arm 22 provii'led at its tree end With a journal box Q3 thraough which the axle of a roller 8 extends, and anti-friction bearings 24 are provided between the said journal box and the axle to reduce the Ytrictional wear, and, for the saine purpose7 roller bearings 25 are litted within the journal boxes l0 around the shafts l'l and l2.

Fitted upon the swinging arm 22 near the outer end thereof iis a clamp or similar securing device 26 to the inner end ot which is pivoted a link 27, the inner end ot said link having a stem slidably engaginga piston 28. The Vsaid.- piston 28 1s slidably mounted within the cylinder 18 and is provided with packing rings to prevent leakage between the piston and the inner surface of the cylinder', as will be readily understood. The'inner end of the piston will extend into the chamber proviilfd by the plates 15 andthe ring 16 when the piston is retracted andfin thc said inner end. ot the piston is titted a spring` 25) bearing upon a presser plate 30 which is slidably mounted in the inner end ot' the piston. Aushoc 3l is provided adjacent the inner end ot the piston and is constructed with a slot or slightly elongated opening El?, through which a pin 34; is inserted to pivotally attach the shoe to the inner end of the piston. The slot 2525 is formed in anla'ngular otl'set 235 ol the shoe which bears against the presser plate 2:30, the said slot permitting the shoe to assume different angular relations to the piston, and the spring` end presser plate permitting it to automatically accommodate itselE to the cam at the point ot contact therewith. The inner end ot the piston is biturcated and the angular stein or projection 35 is held within the bifurcation so that lateral movenient ot' the shoe will be prevented. The presser plate is constructed with an outwardly extending guide pin or stein 36 which fits within a sleeve or hollow guide 37 inserted in the end oli the body of the piston and the spring Q9 is coiled around the said guide and the said stein so that when it expands it will tend to throw the presser plate outward but will yield when the shoe assumes an angular relation to the piston, as will be readily understood upon reference to the vupper portions of Figs. l and 3.

The cam 2O is provided with a reduced portieri or recess on that side nearer the track section 9, as clearly shown. 'lhe earn as clearly shown. is hollow so as to avoid unneri'fssary \\'(iik9flit= and the .shoes 3l have smooth rom-ave inner slp-faces adapted to torni a ground lioint wi'tlli'the outer surface of the cani`r the wid/th ot' the shoe being greater than the extent oli the recess axially ot the cani.

The piston is constructed with a longitudinal groore 3H and retainer' or guide 39 is secured in the side of the ring 1 (5 and extends through the saine to engage the said groove 28 so that axial` rotation of the piston-within the cylinder will be prevented and the parts will be thereby held in their proper relations.

ln setting up the motor for practical use a reservoir or storage tank 4() will be provided and the pipe lll of the motor Will he connected with the said storage tank and equipped with a stop cock 41 or any other convenient form ot cut-oit so that the pressure lluid may be admitted from the tank to the motor, as may be desired. The supply ot' compressed air may be maintained in the reservoir through any preferred form of air compressor, indicated conventionally at 4Z.

lu the operation of the motor, the rollers engaging the elongated portion of the track will be in the position ot a rolling body upon an inclined plane eccentric to the pressure chamber and will tend to descend the saine, and, as the parts connected .viththe rollers are so arranged that they niust travel therewith, rotary motion -`.vill be imparted to the inner casing or pressure chamber and the saine will be forced to rotate around the cani 2l?. rl`he compressed air admitted to the pressure chamber will act upon the pistons and tend to move the saine outwardly in 'the respective cylinders so that, as each roller or pair of rollers anproaches the e ongated portion ot the track, the rollers will he thrown outwardlyand an increased leverage thereby obtained. The momentum acquired will carry the parts up the greater portionot the return circuit ot the track concentric to the pressure chamber until a second piston and rollers connected therewith are in position to travel downwardly upon the elongated portion ot the track'. As

'each piston moves to an upper level the shoe connected with. said piston will be brought closer to the earn 2O and, when it reaches that point at which the cain is closest to the cylinder, will be caused to fit against the said cam so that the pressure on the inner surface ot' the shoe will be relieved and the rollers then held to the track only by centrifugal force. The fluid pressure upon the convex surface ot the shoe will tend to hold the saine to the ca :n and draw the piston inwardly while traveling over the 'upper half ot the earn, but in the continued rotation ci: the motor the shoe will. pass over the recess or reduced portion .ot the cam and the pressure lluid will then be admitted through the recess to the under side ot the shoe so as to exert an outward torce thereon and on the piston connected therewith, so

:missere that the arm 21 will be swung outwardly and the rollers heldin engagement with the elongated portion 9 of the track.

What I claim is zl. A motor comprising a stationary cam, a rotary pressure chamber entirely surrounding the cam in eccentric relation thereto, actuating elements carried externally by the pressure chamber, devices connected to said elements and extending into the chamber to ride on the cam, and means for admitting fluid pressure to the chamber to act on said last named devices.

2. A motor comprising a stationary vertically disposed track, a. rotary pressure chamber, a cam arranged eccentrically within the pressure chamber, track-engaging .members carried by the rotary pressure chamber, and members connected with the track engaging members and extending radially into the pressure chamber to bear upon the cam, the upper portion of the track being concentric With the cam'y ind the lower portion of the track being elongated relative to the upper portion thereof, that part of the lower portion of the track upon which the track engaging members ride downwardly being eccentric to the pressure cliamber and the remaining part thereof being concentric to said chamber.

3. A motor comprising an endless track,

. a rotary pressure chamber arranged eccentrically to said track, means for admitting pressure Huid to said chamber, a stationary cani disposed eccentrically within i" e s sure chamber and having a recess out-er surface, radial cylinders carried by said pressure chamber, pistons slidably mounted in said cylinders, shoes carried by the inner ends of said pistons and adapted to bear f" in presence et two witnesses.

upon the said cam to exclude pressure from their under sides and ride over the circumferential recess therein whereby pressure. may be admitted to their under sides, ai'idV centrifugal rollers connected with the outer'l ends of the pistons and traveling upon the track.

4. A motor comprising an endless track, a rotary pressure chamber arranged eccentrically to said track, a pressure Huid supply pipe entering said chamber through one side thereof and constituting its axis of rotation, a cylindrical body iXed eccentrically upon said pipe within the pressure chamber, cylinders radiating from the said chamber, pistons mounted Within the cylinders, shoes pivoted at the inner ends of the pistons and adapted to ride on said cylindrical body, means whereby the pressure'in the chamber will release the shoes from the' said body, and rollers connected with the outer ends o' the piston to travel upon the track.

5. A motor comprising a support, an end less track arranged within the support, a pressure fluid supply pipe disposed eccentrically to the said track, a cylindrical body secured eccentrically to the sai supply pipe, a pressure chamber mounted oncentrically upon the said supply pipe te rotate about the same and inclosing said c 'lindrical body, cylinders radiating from th said pressure chamber, pistons mounted within the s cylinders, traclcengaging members carri by the outer endsot' theb pistons, shoes ing inner concaved :tartes adapted to u y upon the said eylindrieal body and provided with outwardly extending an ular s" slidably pivoted to the innr vs or if tons, means whereby the pi. essure release the slices from the cylindri and yieldabie devices mounted in the pisti` is and bearing upon the said angular stems to hold the shoes toward the said cylindrical` body.

In testimony whereof l adir: my signature 52a LEROY @Lalli/"SGN {ne} Witnesses: WM. J. Naam,

SAMUEL N. AoKiin. 

